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My old HJC AC-11 had aged out. It was made in 2003 (more than 5 years old) and is Snell M2000. I've only used it for track days and racing and it's been stored in a cool dry place. It's still like new, but the born-on date and Snell rating disqualify it from racing.
The HJC AC-11 fit me perfectly. I "track tested" one a few years ago and it protected me flawlessly.
So I got the new FS-15 Carbon. I thought the AC-11 was a decent helmet but the FS-15 is so much nicer! At 1/3 off list price and fast reasonably priced shipping, my eBay seller (powerdrom) gets